Home | History | Annotate | Line # | Download | only in netbt
rfcomm_socket.c revision 1.35 
      1 /*	$NetBSD: rfcomm_socket.c,v 1.35 2015/04/24 22:32:37 rtr Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2006 Itronix Inc.
      5  * All rights reserved.
      6  *
      7  * Written by Iain Hibbert for Itronix Inc.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. The name of Itronix Inc. may not be used to endorse
     18  *    or promote products derived from this software without specific
     19  *    prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     23  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     24  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY
     25  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     26  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     27  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     28  * ON ANY THEORY OF LIABILITY, WHETHER IN
     29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     31  * POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 #include <sys/cdefs.h>
     35 __KERNEL_RCSID(0, "$NetBSD: rfcomm_socket.c,v 1.35 2015/04/24 22:32:37 rtr Exp $");
     36 
     37 /* load symbolic names */
     38 #ifdef BLUETOOTH_DEBUG
     39 #define PRUREQUESTS
     40 #define PRCOREQUESTS
     41 #endif
     42 
     43 #include <sys/param.h>
     44 #include <sys/domain.h>
     45 #include <sys/kernel.h>
     46 #include <sys/mbuf.h>
     47 #include <sys/proc.h>
     48 #include <sys/protosw.h>
     49 #include <sys/socket.h>
     50 #include <sys/socketvar.h>
     51 #include <sys/systm.h>
     52 
     53 #include <netbt/bluetooth.h>
     54 #include <netbt/rfcomm.h>
     55 
     56 /****************************************************************************
     57  *
     58  *	RFCOMM SOCK_STREAM Sockets - serial line emulation
     59  *
     60  */
     61 
     62 static void rfcomm_connecting(void *);
     63 static void rfcomm_connected(void *);
     64 static void rfcomm_disconnected(void *, int);
     65 static void *rfcomm_newconn(void *, struct sockaddr_bt *, struct sockaddr_bt *);
     66 static void rfcomm_complete(void *, int);
     67 static void rfcomm_linkmode(void *, int);
     68 static void rfcomm_input(void *, struct mbuf *);
     69 
     70 static const struct btproto rfcomm_proto = {
     71 	rfcomm_connecting,
     72 	rfcomm_connected,
     73 	rfcomm_disconnected,
     74 	rfcomm_newconn,
     75 	rfcomm_complete,
     76 	rfcomm_linkmode,
     77 	rfcomm_input,
     78 };
     79 
     80 /* sysctl variables */
     81 int rfcomm_sendspace = 4096;
     82 int rfcomm_recvspace = 4096;
     83 
     84 static int
     85 rfcomm_attach(struct socket *so, int proto)
     86 {
     87 	int error;
     88 
     89 	KASSERT(so->so_pcb == NULL);
     90 
     91 	if (so->so_lock == NULL) {
     92 		mutex_obj_hold(bt_lock);
     93 		so->so_lock = bt_lock;
     94 		solock(so);
     95 	}
     96 	KASSERT(solocked(so));
     97 
     98 	/*
     99 	 * Since we have nothing to add, we attach the DLC
    100 	 * structure directly to our PCB pointer.
    101 	 */
    102 	error = soreserve(so, rfcomm_sendspace, rfcomm_recvspace);
    103 	if (error)
    104 		return error;
    105 
    106 	error = rfcomm_attach_pcb((struct rfcomm_dlc **)&so->so_pcb,
    107 				&rfcomm_proto, so);
    108 	if (error)
    109 		return error;
    110 
    111 	error = rfcomm_rcvd_pcb(so->so_pcb, sbspace(&so->so_rcv));
    112 	if (error) {
    113 		rfcomm_detach_pcb((struct rfcomm_dlc **)&so->so_pcb);
    114 		return error;
    115 	}
    116 	return 0;
    117 }
    118 
    119 static void
    120 rfcomm_detach(struct socket *so)
    121 {
    122 	KASSERT(so->so_pcb != NULL);
    123 	rfcomm_detach_pcb((struct rfcomm_dlc **)&so->so_pcb);
    124 	KASSERT(so->so_pcb == NULL);
    125 }
    126 
    127 static int
    128 rfcomm_accept(struct socket *so, struct sockaddr *nam)
    129 {
    130 	struct rfcomm_dlc *pcb = so->so_pcb;
    131 
    132 	KASSERT(solocked(so));
    133 	KASSERT(nam != NULL);
    134 
    135 	if (pcb == NULL)
    136 		return EINVAL;
    137 
    138 	return rfcomm_peeraddr_pcb(pcb, (struct sockaddr_bt *)nam);
    139 }
    140 
    141 static int
    142 rfcomm_bind(struct socket *so, struct sockaddr *nam, struct lwp *l)
    143 {
    144 	struct rfcomm_dlc *pcb = so->so_pcb;
    145 	struct sockaddr_bt *sa = (struct sockaddr_bt *)nam;
    146 
    147 	KASSERT(solocked(so));
    148 	KASSERT(nam != NULL);
    149 
    150 	if (pcb == NULL)
    151 		return EINVAL;
    152 
    153 	if (sa->bt_len != sizeof(struct sockaddr_bt))
    154 		return EINVAL;
    155 
    156 	if (sa->bt_family != AF_BLUETOOTH)
    157 		return EAFNOSUPPORT;
    158 
    159 	return rfcomm_bind_pcb(pcb, sa);
    160 }
    161 
    162 static int
    163 rfcomm_listen(struct socket *so, struct lwp *l)
    164 {
    165 	struct rfcomm_dlc *pcb = so->so_pcb;
    166 
    167 	KASSERT(solocked(so));
    168 
    169 	if (pcb == NULL)
    170 		return EINVAL;
    171 
    172 	return rfcomm_listen_pcb(pcb);
    173 }
    174 
    175 static int
    176 rfcomm_connect(struct socket *so, struct mbuf *nam, struct lwp *l)
    177 {
    178 	struct rfcomm_dlc *pcb = so->so_pcb;
    179 	struct sockaddr_bt *sa;
    180 
    181 	KASSERT(solocked(so));
    182 	KASSERT(nam != NULL);
    183 
    184 	if (pcb == NULL)
    185 		return EINVAL;
    186 
    187 	sa = mtod(nam, struct sockaddr_bt *);
    188 	if (sa->bt_len != sizeof(struct sockaddr_bt))
    189 		return EINVAL;
    190 
    191 	if (sa->bt_family != AF_BLUETOOTH)
    192 		return EAFNOSUPPORT;
    193 
    194 	soisconnecting(so);
    195 	return rfcomm_connect_pcb(pcb, sa);
    196 }
    197 
    198 static int
    199 rfcomm_connect2(struct socket *so, struct socket *so2)
    200 {
    201 	struct rfcomm_dlc *pcb = so->so_pcb;
    202 
    203 	KASSERT(solocked(so));
    204 
    205 	if (pcb == NULL)
    206 		return EINVAL;
    207 
    208 	return EOPNOTSUPP;
    209 }
    210 
    211 static int
    212 rfcomm_disconnect(struct socket *so)
    213 {
    214 	struct rfcomm_dlc *pcb = so->so_pcb;
    215 
    216 	KASSERT(solocked(so));
    217 
    218 	if (pcb == NULL)
    219 		return EINVAL;
    220 
    221 	soisdisconnecting(so);
    222 	return rfcomm_disconnect_pcb(pcb, so->so_linger);
    223 }
    224 
    225 static int
    226 rfcomm_shutdown(struct socket *so)
    227 {
    228 	KASSERT(solocked(so));
    229 
    230 	socantsendmore(so);
    231 	return 0;
    232 }
    233 
    234 static int
    235 rfcomm_abort(struct socket *so)
    236 {
    237 	struct rfcomm_dlc *pcb = so->so_pcb;
    238 
    239 	KASSERT(solocked(so));
    240 
    241 	if (pcb == NULL)
    242 		return EINVAL;
    243 
    244 	rfcomm_disconnect_pcb(pcb, 0);
    245 	soisdisconnected(so);
    246 	rfcomm_detach(so);
    247 	return 0;
    248 }
    249 
    250 static int
    251 rfcomm_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp)
    252 {
    253 	return EPASSTHROUGH;
    254 }
    255 
    256 static int
    257 rfcomm_stat(struct socket *so, struct stat *ub)
    258 {
    259 	KASSERT(solocked(so));
    260 
    261 	return 0;
    262 }
    263 
    264 static int
    265 rfcomm_peeraddr(struct socket *so, struct sockaddr *nam)
    266 {
    267 	struct rfcomm_dlc *pcb = so->so_pcb;
    268 
    269 	KASSERT(solocked(so));
    270 	KASSERT(pcb != NULL);
    271 	KASSERT(nam != NULL);
    272 
    273 	return rfcomm_peeraddr_pcb(pcb, (struct sockaddr_bt *)nam);
    274 }
    275 
    276 static int
    277 rfcomm_sockaddr(struct socket *so, struct sockaddr *nam)
    278 {
    279 	struct rfcomm_dlc *pcb = so->so_pcb;
    280 
    281 	KASSERT(solocked(so));
    282 	KASSERT(pcb != NULL);
    283 	KASSERT(nam != NULL);
    284 
    285 	return rfcomm_sockaddr_pcb(pcb, (struct sockaddr_bt *)nam);
    286 }
    287 
    288 static int
    289 rfcomm_rcvd(struct socket *so, int flags, struct lwp *l)
    290 {
    291 	struct rfcomm_dlc *pcb = so->so_pcb;
    292 
    293 	KASSERT(solocked(so));
    294 
    295 	if (pcb == NULL)
    296 		return EINVAL;
    297 
    298 	return rfcomm_rcvd_pcb(pcb, sbspace(&so->so_rcv));
    299 }
    300 
    301 static int
    302 rfcomm_recvoob(struct socket *so, struct mbuf *m, int flags)
    303 {
    304 	KASSERT(solocked(so));
    305 
    306 	return EOPNOTSUPP;
    307 }
    308 
    309 static int
    310 rfcomm_send(struct socket *so, struct mbuf *m, struct mbuf *nam,
    311     struct mbuf *control, struct lwp *l)
    312 {
    313 	struct rfcomm_dlc *pcb = so->so_pcb;
    314 	int err = 0;
    315 	struct mbuf *m0;
    316 
    317 	KASSERT(solocked(so));
    318 	KASSERT(m != NULL);
    319 
    320 	if (control)	/* no use for that */
    321 		m_freem(control);
    322 
    323 	if (pcb == NULL) {
    324 		err = EINVAL;
    325 		goto release;
    326 	}
    327 
    328 	m0 = m_copypacket(m, M_DONTWAIT);
    329 	if (m0 == NULL) {
    330 		err = ENOMEM;
    331 		goto release;
    332 	}
    333 
    334 	sbappendstream(&so->so_snd, m);
    335 	return rfcomm_send_pcb(pcb, m0);
    336 
    337 release:
    338 	m_freem(m);
    339 	return err;
    340 }
    341 
    342 static int
    343 rfcomm_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control)
    344 {
    345 	KASSERT(solocked(so));
    346 
    347 	if (m)
    348 		m_freem(m);
    349 	if (control)
    350 		m_freem(control);
    351 
    352 	return EOPNOTSUPP;
    353 }
    354 
    355 static int
    356 rfcomm_purgeif(struct socket *so, struct ifnet *ifp)
    357 {
    358 
    359 	return EOPNOTSUPP;
    360 }
    361 
    362 /*
    363  * User Request.
    364  * up is socket
    365  * m is optional mbuf chain containing message
    366  * ctl is either
    367  *	optional mbuf chain containing socket options
    368  * l is pointer to process requesting action (if any)
    369  *
    370  * we are responsible for disposing of m and ctl if
    371  * they are mbuf chains
    372  */
    373 static int
    374 rfcomm_usrreq(struct socket *up, int req, struct mbuf *m,
    375 		struct mbuf *nam, struct mbuf *ctl, struct lwp *l)
    376 {
    377 	struct rfcomm_dlc *pcb = up->so_pcb;
    378 	int err = 0;
    379 
    380 	DPRINTFN(2, "%s\n", prurequests[req]);
    381 	KASSERT(req != PRU_ATTACH);
    382 	KASSERT(req != PRU_DETACH);
    383 	KASSERT(req != PRU_ACCEPT);
    384 	KASSERT(req != PRU_BIND);
    385 	KASSERT(req != PRU_LISTEN);
    386 	KASSERT(req != PRU_CONNECT);
    387 	KASSERT(req != PRU_CONNECT2);
    388 	KASSERT(req != PRU_DISCONNECT);
    389 	KASSERT(req != PRU_SHUTDOWN);
    390 	KASSERT(req != PRU_ABORT);
    391 	KASSERT(req != PRU_CONTROL);
    392 	KASSERT(req != PRU_SENSE);
    393 	KASSERT(req != PRU_PEERADDR);
    394 	KASSERT(req != PRU_SOCKADDR);
    395 	KASSERT(req != PRU_RCVD);
    396 	KASSERT(req != PRU_RCVOOB);
    397 	KASSERT(req != PRU_SEND);
    398 	KASSERT(req != PRU_SENDOOB);
    399 	KASSERT(req != PRU_PURGEIF);
    400 
    401 	if (pcb == NULL) {
    402 		err = EINVAL;
    403 		goto release;
    404 	}
    405 
    406 	switch(req) {
    407 	case PRU_FASTTIMO:
    408 	case PRU_SLOWTIMO:
    409 	case PRU_PROTORCV:
    410 	case PRU_PROTOSEND:
    411 		err = EOPNOTSUPP;
    412 		break;
    413 
    414 	default:
    415 		UNKNOWN(req);
    416 		err = EOPNOTSUPP;
    417 		break;
    418 	}
    419 
    420 release:
    421 	if (m) m_freem(m);
    422 	if (ctl) m_freem(ctl);
    423 	return err;
    424 }
    425 
    426 /*
    427  * rfcomm_ctloutput(req, socket, sockopt)
    428  *
    429  */
    430 int
    431 rfcomm_ctloutput(int req, struct socket *so, struct sockopt *sopt)
    432 {
    433 	struct rfcomm_dlc *pcb = so->so_pcb;
    434 	int err = 0;
    435 
    436 	DPRINTFN(2, "%s\n", prcorequests[req]);
    437 
    438 	if (pcb == NULL)
    439 		return EINVAL;
    440 
    441 	if (sopt->sopt_level != BTPROTO_RFCOMM)
    442 		return ENOPROTOOPT;
    443 
    444 	switch(req) {
    445 	case PRCO_GETOPT:
    446 		err = rfcomm_getopt(pcb, sopt);
    447 		break;
    448 
    449 	case PRCO_SETOPT:
    450 		err = rfcomm_setopt(pcb, sopt);
    451 		break;
    452 
    453 	default:
    454 		err = ENOPROTOOPT;
    455 		break;
    456 	}
    457 
    458 	return err;
    459 }
    460 
    461 /**********************************************************************
    462  *
    463  * RFCOMM callbacks
    464  */
    465 
    466 static void
    467 rfcomm_connecting(void *arg)
    468 {
    469 	/* struct socket *so = arg; */
    470 
    471 	KASSERT(arg != NULL);
    472 	DPRINTF("Connecting\n");
    473 }
    474 
    475 static void
    476 rfcomm_connected(void *arg)
    477 {
    478 	struct socket *so = arg;
    479 
    480 	KASSERT(so != NULL);
    481 	DPRINTF("Connected\n");
    482 	soisconnected(so);
    483 }
    484 
    485 static void
    486 rfcomm_disconnected(void *arg, int err)
    487 {
    488 	struct socket *so = arg;
    489 
    490 	KASSERT(so != NULL);
    491 	DPRINTF("Disconnected\n");
    492 
    493 	so->so_error = err;
    494 	soisdisconnected(so);
    495 }
    496 
    497 static void *
    498 rfcomm_newconn(void *arg, struct sockaddr_bt *laddr,
    499     struct sockaddr_bt *raddr)
    500 {
    501 	struct socket *so = arg;
    502 
    503 	DPRINTF("New Connection\n");
    504 	so = sonewconn(so, false);
    505 	if (so == NULL)
    506 		return NULL;
    507 
    508 	soisconnecting(so);
    509 
    510 	return so->so_pcb;
    511 }
    512 
    513 /*
    514  * rfcomm_complete(rfcomm_dlc, length)
    515  *
    516  * length bytes are sent and may be removed from socket buffer
    517  */
    518 static void
    519 rfcomm_complete(void *arg, int length)
    520 {
    521 	struct socket *so = arg;
    522 
    523 	sbdrop(&so->so_snd, length);
    524 	sowwakeup(so);
    525 }
    526 
    527 /*
    528  * rfcomm_linkmode(rfcomm_dlc, new)
    529  *
    530  * link mode change notification.
    531  */
    532 static void
    533 rfcomm_linkmode(void *arg, int new)
    534 {
    535 	struct socket *so = arg;
    536 	struct sockopt sopt;
    537 	int mode;
    538 
    539 	DPRINTF("auth %s, encrypt %s, secure %s\n",
    540 		(new & RFCOMM_LM_AUTH ? "on" : "off"),
    541 		(new & RFCOMM_LM_ENCRYPT ? "on" : "off"),
    542 		(new & RFCOMM_LM_SECURE ? "on" : "off"));
    543 
    544 	sockopt_init(&sopt, BTPROTO_RFCOMM, SO_RFCOMM_LM, 0);
    545 	(void)rfcomm_getopt(so->so_pcb, &sopt);
    546 	(void)sockopt_getint(&sopt, &mode);
    547 	sockopt_destroy(&sopt);
    548 
    549 	if (((mode & RFCOMM_LM_AUTH) && !(new & RFCOMM_LM_AUTH))
    550 	    || ((mode & RFCOMM_LM_ENCRYPT) && !(new & RFCOMM_LM_ENCRYPT))
    551 	    || ((mode & RFCOMM_LM_SECURE) && !(new & RFCOMM_LM_SECURE)))
    552 		rfcomm_disconnect_pcb(so->so_pcb, 0);
    553 }
    554 
    555 /*
    556  * rfcomm_input(rfcomm_dlc, mbuf)
    557  */
    558 static void
    559 rfcomm_input(void *arg, struct mbuf *m)
    560 {
    561 	struct socket *so = arg;
    562 
    563 	KASSERT(so != NULL);
    564 
    565 	if (m->m_pkthdr.len > sbspace(&so->so_rcv)) {
    566 		printf("%s: %d bytes dropped (socket buffer full)\n",
    567 			__func__, m->m_pkthdr.len);
    568 		m_freem(m);
    569 		return;
    570 	}
    571 
    572 	DPRINTFN(10, "received %d bytes\n", m->m_pkthdr.len);
    573 
    574 	sbappendstream(&so->so_rcv, m);
    575 	sorwakeup(so);
    576 }
    577 
    578 PR_WRAP_USRREQS(rfcomm)
    579 
    580 #define	rfcomm_attach		rfcomm_attach_wrapper
    581 #define	rfcomm_detach		rfcomm_detach_wrapper
    582 #define	rfcomm_accept		rfcomm_accept_wrapper
    583 #define	rfcomm_bind		rfcomm_bind_wrapper
    584 #define	rfcomm_listen		rfcomm_listen_wrapper
    585 #define	rfcomm_connect		rfcomm_connect_wrapper
    586 #define	rfcomm_connect2		rfcomm_connect2_wrapper
    587 #define	rfcomm_disconnect	rfcomm_disconnect_wrapper
    588 #define	rfcomm_shutdown		rfcomm_shutdown_wrapper
    589 #define	rfcomm_abort		rfcomm_abort_wrapper
    590 #define	rfcomm_ioctl		rfcomm_ioctl_wrapper
    591 #define	rfcomm_stat		rfcomm_stat_wrapper
    592 #define	rfcomm_peeraddr		rfcomm_peeraddr_wrapper
    593 #define	rfcomm_sockaddr		rfcomm_sockaddr_wrapper
    594 #define	rfcomm_rcvd		rfcomm_rcvd_wrapper
    595 #define	rfcomm_recvoob		rfcomm_recvoob_wrapper
    596 #define	rfcomm_send		rfcomm_send_wrapper
    597 #define	rfcomm_sendoob		rfcomm_sendoob_wrapper
    598 #define	rfcomm_purgeif		rfcomm_purgeif_wrapper
    599 #define	rfcomm_usrreq		rfcomm_usrreq_wrapper
    600 
    601 const struct pr_usrreqs rfcomm_usrreqs = {
    602 	.pr_attach	= rfcomm_attach,
    603 	.pr_detach	= rfcomm_detach,
    604 	.pr_accept	= rfcomm_accept,
    605 	.pr_bind	= rfcomm_bind,
    606 	.pr_listen	= rfcomm_listen,
    607 	.pr_connect	= rfcomm_connect,
    608 	.pr_connect2	= rfcomm_connect2,
    609 	.pr_disconnect	= rfcomm_disconnect,
    610 	.pr_shutdown	= rfcomm_shutdown,
    611 	.pr_abort	= rfcomm_abort,
    612 	.pr_ioctl	= rfcomm_ioctl,
    613 	.pr_stat	= rfcomm_stat,
    614 	.pr_peeraddr	= rfcomm_peeraddr,
    615 	.pr_sockaddr	= rfcomm_sockaddr,
    616 	.pr_rcvd	= rfcomm_rcvd,
    617 	.pr_recvoob	= rfcomm_recvoob,
    618 	.pr_send	= rfcomm_send,
    619 	.pr_sendoob	= rfcomm_sendoob,
    620 	.pr_purgeif	= rfcomm_purgeif,
    621 	.pr_generic	= rfcomm_usrreq,
    622 };
    623